Apparatus

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sensors Mode-S transponder

A19C19

ICAO 24-bit transponder address · allocated to United States

Hex
A19C19
Octal
50316031
Decimal
10,591,257
Country
US
No current signal · last broadcast 1h ago
Flights observed
55
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A19C19.

Country allocation

The ICAO 24-bit address A19C19 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 1 distinct

Callsign Airline Flights Last seen
N2022K - 55 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N2022K - Jul 14, 13:05 UTCJul 14, 15:10 UTC2h 5m
2026-07-14 N2022K IOW → DBQ Jul 14, 11:50 UTCJul 14, 12:05 UTC15m
2026-07-13 N2022K - Jul 13, 16:30 UTCJul 13, 17:25 UTC55m
2026-07-13 N2022K - Jul 13, 14:15 UTCJul 13, 15:40 UTC1h 25m
2026-07-12 N2022K - Jul 12, 23:05 UTCJul 13, 00:15 UTC1h 10m
2026-07-12 N2022K - Jul 12, 19:45 UTCJul 12, 21:30 UTC1h 45m
2026-07-12 N2022K - Jul 12, 17:35 UTCJul 12, 19:15 UTC1h 40m
2026-07-12 N2022K - Jul 12, 14:05 UTCJul 12, 15:35 UTC1h 30m
2026-07-12 N2022K - Jul 12, 12:30 UTCJul 12, 12:50 UTC20m
2026-07-09 N2022K - Jul 9, 16:15 UTCJul 9, 16:50 UTC35m
2026-07-09 N2022K - Jul 9, 14:15 UTCJul 9, 15:15 UTC1h 0m
2026-07-09 N2022K IOW → FCM Jul 9, 11:50 UTCJul 9, 12:35 UTC45m
2026-07-05 N2022K - Jul 5, 18:05 UTCJul 5, 19:50 UTC1h 45m
2026-07-05 N2022K - Jul 5, 16:35 UTCJul 5, 17:00 UTC25m
2026-07-05 N2022K - Jul 5, 13:30 UTCJul 5, 15:10 UTC1h 40m
2026-06-26 N2022K DSM → IOW Jun 26, 01:20 UTCJun 26, 01:45 UTC25m
2026-06-25 N2022K - Jun 25, 23:39 UTCJun 26, 00:30 UTC50m
2026-06-25 N2022K IOW → ISW Jun 25, 18:10 UTCJun 25, 18:45 UTC35m
2026-06-24 N2022K IAD → IOW Jun 24, 21:54 UTCJun 25, 00:40 UTC2h 45m
2026-06-23 N2022K - Jun 23, 19:39 UTCJun 23, 21:20 UTC1h 40m
2026-06-21 N2022K - Jun 21, 01:35 UTCJun 21, 02:45 UTC1h 10m
2026-06-20 N2022K - Jun 20, 13:09 UTCJun 20, 13:44 UTC35m
2026-06-20 N2022K - Jun 20, 11:49 UTCJun 20, 11:59 UTC10m
2026-06-17 N2022K - Jun 17, 20:55 UTCJun 17, 21:25 UTC30m
2026-06-17 N2022K - Jun 17, 17:15 UTCJun 17, 20:10 UTC2h 55m
2026-06-17 N2022K - Jun 17, 14:40 UTCJun 17, 15:46 UTC1h 5m
2026-06-16 N2022K - Jun 16, 18:09 UTCJun 16, 19:05 UTC55m
2026-06-15 N2022K - Jun 15, 15:45 UTCJun 15, 16:24 UTC40m
2026-06-15 N2022K - Jun 15, 13:40 UTCJun 15, 14:45 UTC1h 5m
2026-06-15 N2022K - Jun 15, 11:34 UTCJun 15, 12:25 UTC50m
2026-06-12 N2022K - Jun 12, 16:30 UTCJun 12, 18:50 UTC2h 20m
2026-06-12 N2022K - Jun 12, 12:55 UTCJun 12, 15:00 UTC2h 5m
2026-06-12 N2022K IOW → AMW Jun 12, 11:45 UTCJun 12, 12:10 UTC25m
2026-06-10 N2022K - Jun 10, 17:25 UTCJun 10, 18:55 UTC1h 30m
2026-06-10 N2022K - Jun 10, 15:15 UTCJun 10, 16:05 UTC50m
2026-06-10 N2022K - Jun 10, 13:00 UTCJun 10, 13:40 UTC40m
2026-06-08 N2022K - Jun 8, 20:40 UTCJun 8, 21:40 UTC1h 0m
2026-06-08 N2022K - Jun 8, 17:05 UTCJun 8, 17:45 UTC40m
2026-06-08 N2022K - Jun 8, 15:15 UTCJun 8, 16:00 UTC45m
2026-06-05 N2022K - Jun 5, 18:30 UTCJun 5, 19:10 UTC40m
2026-06-05 N2022K IOW → STL Jun 5, 11:45 UTCJun 5, 12:20 UTC35m
2026-06-01 N2022K - Jun 1, 17:20 UTCJun 1, 17:45 UTC25m
2026-06-01 N2022K - Jun 1, 00:15 UTCJun 1, 01:05 UTC50m
2026-05-31 N2022K - May 31, 22:50 UTCMay 31, 23:30 UTC40m
2026-05-29 N2022K - May 29, 00:55 UTCMay 29, 01:40 UTC45m
2026-05-28 N2022K - May 28, 23:25 UTCMay 29, 00:10 UTC45m
2026-05-28 N2022K - May 28, 19:10 UTCMay 28, 20:20 UTC1h 10m
2026-05-28 N2022K - May 28, 15:10 UTCMay 28, 15:50 UTC40m
2026-05-28 N2022K - May 28, 12:25 UTCMay 28, 13:00 UTC35m
2026-05-27 N2022K DBQ → CID May 27, 17:15 UTCMay 27, 17:35 UTC20m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Mode-S A19C19 frequently asked

What is Mode-S code A19C19?
A19C19 is an ICAO 24-bit transponder address. Allocated to United States.
Where is Mode-S A19C19 registered?
Mode-S code A19C19 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A19C19 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A19C19, octal 50316031, decimal 10,591,257.
What flights does A19C19 operate?
Mode-S A19C19 has broadcast 1 distinct callsign, including N2022K.